JP5618848B2 - Vacuum switchgear - Google Patents

Description

  The present invention relates to a vacuum switchgear that is used in, for example, power transmission / distribution equipment or power reception equipment, and includes an operation rod connected to a movable energization unit and an operation mechanism unit that drives the operation rod.

  A conventional vacuum switchgear is shown in FIG. FIG. 5 is a sectional side view showing the vacuum switchgear. In FIG. 5, a drive source (not shown) of the operation mechanism unit 14, that is, a closing spring (not shown) is stored, the output link 14b is driven by the stored input energy, and the output link 14b is driven. In conjunction with this, the drive lever 16 is rotated together with the main shaft 15 counterclockwise around the axis of the main shaft 15, and the insulated operating rod 13 connected to the other side 16b of the drive lever 16 is pushed upward. The movable energizing shaft 8 connected to the one side 13 a that is the upper end side of the operating rod 13 moves upward, and the movable side electrode 7 of the movable energizing shaft 8 contacts the fixed side electrode 5 of the fixed energizing shaft 6. When the fixed electrode 5 and the movable electrode 7 are in contact with each other, the gap between the electrodes of the vacuum valve 1 is closed. Thereby, the introduction of the vacuum valve 1 is completed.

  When opening the electrodes of the vacuum valve 1, the output link 14 b is driven in the opposite direction to the operation at the time of closing by the drive source (not shown) of the operation mechanism unit 14, and the output link 14 b is driven. In conjunction with this, the main shaft 15 rotates clockwise around the axis of the main shaft 15, and the operation rod 13 connected to the other side 16 b of the drive lever 16 is pushed downward. The movable energizing shaft 8 connected to the one side 13a which is the upper end side of the operating rod 13 moves downward, and the movable side electrode 7 of the movable energizing shaft 8 is separated from the fixed side electrode 5 of the fixed energizing shaft 6 and is in a contact state. Is released. When the contact state between the fixed electrode 5 and the movable electrode 7 is released, the electrode of the vacuum valve 1 is opened.

  Such closing operation and opening operation between the electrodes of the vacuum valve 1 are repeatedly performed at intervals of several seconds.

JP 2000-353460 A

  In the conventional vacuum switchgear described above, the operation mechanism unit 14 performs a closing operation and an opening operation between the electrodes of the vacuum valve 1. Even if the vacuum valve 1 is in a closed state, the vacuum valve 1 is open when the power source is lost. Further, when the vacuum valve 1 is turned on and is in a closed state, it is necessary to maintain that state.

  Although it is necessary to maintain the state in which the vacuum valve 1 is turned on, in the conventional apparatus, for example, as shown in FIG. 6, a large load P acts on the output link 14 b, and the drive lever 16 is attached to the main shaft 15. It rotates clockwise around the axis and acts to push down the operating rod 13 connected to the other side 16b of the drive lever 16. That is, the large load P in the upward direction of the output link 14b causes the movable side electrode 7 of the movable energizing shaft 8 to move away from the fixed side electrode 5 of the fixed energizing shaft 6 so that the contact state is released and the vacuum valve 1 is released. Act to be.

In order to prevent this, as shown in FIG. 6, for example, a holding coil 19 is disposed in the vicinity of one side 16a of the drive lever 16, and the holding coil 19 is excited to attract the plunger 19a of the holding coil 19 downward. As a result, the pressing piece 19b provided at the tip of the plunger 19a moves downward, and the one side 16a of the drive lever 16 is pressed downward by the pressing piece 19b. Since one side 16a of the drive lever 16 is pressed downward by a pressing piece 19b provided at the tip of the plunger 19a, even if a large upward load P is applied to the output link 14b, the large load The drive lever 16 can be prevented from rotating clockwise around the axis of the main shaft 15 against P. Since the rotation of the drive lever 16 can be suppressed, the movable side electrode 7 of the movable energizing shaft 8 is not separated from the fixed side electrode 5 of the fixed energizing shaft 6 and the contact state is not released, and the vacuum valve 1 is turned on. Is to be maintained.

  However, the large upward load P acting on the output link 14b may be as large as 500 kg, for example, although it varies depending on the capacity of the apparatus. Therefore, in order to suppress a load of 500 kg, the suction force of the holding coil 19 needs to be equivalent to a load of 500 kg, and the holding coil 19 has a large structure, which is an expensive device and increases the size of the device. is there.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vacuum switchgear that is excellent in economy and can be miniaturized.

  The vacuum switchgear according to the present invention includes a vacuum valve, a main shaft whose axis is disposed perpendicular to the electrode opening / closing direction of the vacuum valve, and a drive fixed to the main shaft so as to be orthogonal to the main shaft. A lever, an output link connected to one side of the drive lever, an operating mechanism for rotating the main shaft via the drive lever, and one side connected to the movable energizing shaft of the vacuum valve; A vacuum opening / closing apparatus comprising: an operating rod that is connected to the other side of the drive lever, moves in an opening / closing direction between the electrodes of the vacuum valve in conjunction with rotation of the main shaft, and opens / closes between the electrodes of the vacuum valve The operation mechanism unit is configured integrally with the drive shaft driven by the motor, the drive body driven by the storage shaft, and the drive body, and rotates in conjunction with the drive body. Input cam and front An output lever that is rotated by a closing cam and connected to the output link, a load reduction lever body that is engaged with a pin of the output lever by the rotation of the output lever, and the load reduction lever body The holding coil device holds the engagement state between the pin of the output lever and the load receiving portion of the load reducing lever body.

  The vacuum switchgear according to the present invention holds the load reduction lever engaged with the pin of the output lever by the rotation of the output lever and the engagement state between the pin of the output lever and the load reduction lever by sucking the load reduction lever. By providing the holding coil, it is possible to obtain a vacuum switchgear that is economical and can be miniaturized.

It is a front view shown in the partial cross section which shows the vacuum switchgear concerning Embodiment 1 of this invention. It is a top view shown in the partial cross section which shows the vacuum switchgear concerning Embodiment 1 of this invention. It is a side view shown with a partial cross section which shows the vacuum switchgear concerning Embodiment 1 of this invention. It is a side view shown with a partial cross section in the vacuum switchgear concerning Embodiment 1 of this invention. It is a cross-sectional side view which shows the conventional vacuum switchgear. It is a principal part cross-section side view which shows the conventional vacuum switchgear.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a front view showing a partial cross section of a vacuum switchgear according to Embodiment 1 of the present invention. FIG. 2 is a plan view showing a partial cross section of the vacuum switchgear according to Embodiment 1 of the present invention. FIG. 3 is a side view showing a partial cross section of the vacuum switchgear according to Embodiment 1 of the present invention. FIG. 4 is a side view showing a partial cross section of the vacuum switchgear according to Embodiment 1 of the present invention.

  In each of these drawings, reference numeral 20 denotes a single pole part constituting the vacuum switching device, and the figure shows a case of three phases as an example, and three single pole parts 20 are arranged to have a three-phase configuration. Reference numeral 21 denotes a base frame to which the wheels 22 are attached, and 23 denotes a hollow support insulator attached to the base frame 21, and an operation rod 38 to be described later is inserted through the support insulator 23. Reference numeral 24 denotes, for example, a hollow support insulator disposed on the upper side of the support insulator 23, and a vacuum valve 26 described later is disposed in the support insulator 24. Reference numeral 25 denotes a hollow connector disposed between the support insulator 24 and the support insulator 23.

  Reference numeral 26 denotes a vacuum valve disposed in the support insulator 24, and 27 denotes an upper terminal conductor attached to the upper side of the support insulator 24, which is attached by an upper terminal conductor attachment plate 28. Reference numeral 29 denotes a fixed-side electrode disposed in the vacuum valve 26 and fixed to the fixed energizing shaft 30, and is electrically connected to the upper terminal conductor 27 through the fixed energizing shaft 30. Reference numeral 31 denotes a movable side electrode which is disposed in the vacuum valve 1 and is opposed to the fixed side electrode 29 and fixed to the movable energizing shaft 32. Reference numeral 33 denotes a lower terminal conductor attached to the lower side of the support insulator 24, and is attached by a lower terminal conductor attachment plate 34.

  Reference numeral 35 denotes a flexible conductor that electrically connects the movable energizing shaft 32 extending to the outside of the vacuum valve 26 and the lower terminal conductor 33. Reference numeral 36 denotes an upper junction provided at an end portion of the upper terminal conductor 27 extending outside the support insulator 24, and reference numeral 37 denotes a lower junction provided at an end portion of the lower terminal conductor 33 extending outside the support insulator 24. is there.

  Reference numeral 38 denotes an insulated operating rod that is inserted through the support insulator 23. One end of the operating rod 38, that is, the upper end side passes through the connecting body 25 and extends to the lower end portion that extends outside the vacuum valve 26 of the movable energizing shaft 32. The other side of the operation rod 38, that is, the lower end side is inserted into the base frame 21 and positioned in the base frame 21.

Reference numeral 39 denotes a main shaft whose shaft center is disposed so as to be orthogonal to the opening / closing direction between the fixed electrode 29 and the movable electrode 31 of the vacuum valve 26, that is, the shaft center of the operation rod 38. It is pivotally supported. 40 is a drive lever fixed to the main shaft 39, the one side 40a of the drive lever 40 is more linked to the pin to an output link 101 of the operation mechanism unit 10 0 you later, spindle 39 via the drive lever 40 Rotate. The other side 40b of the drive lever 40 is further connected to a rotatably pin to the other side, which is the lower end of the operating rod 38. Reference numeral 43 is an open spring, and 44 is a contact pressure spring.

  Then, the opening operation and the closing operation between the fixed side electrode 29 and the movable side electrode 31 of the vacuum valve 26 are performed by a plurality of operation mechanism units, and the operation mechanism unit selected by the switching operation is used via the drive lever 40. By rotating the main shaft 39, the operation rod 38 is actuated in the vertical direction, and the opening and closing operations between the fixed electrode 29 and the movable electrode 31 of the vacuum valve 26 are performed.

  As an example, the operation mechanism unit 100 according to the first embodiment has an output link 101 coupled to one side 40 a of the drive lever 40, and is configured to rotate the main shaft 39 via the drive lever 40. Has been. The figure shows a case where two operation mechanism units 100 are provided as an example, and the operation is selectively switched.

Operation mechanism unit 100 is provided with motors 103, a motor output shaft (gear) 104 by energizing shaft 106 which is driven engaged with the small gear 105 of the motor 103, the drive member driven by the prestressing shaft 106 (Large gear) 107, a driving body 107 and a support shaft 108, which are integrally formed, a turning cam 109 that rotates in conjunction with the driving body 107, and an output when the output roller 110 is pushed down by the feeding cam 109. An output lever 112 that is rotated counterclockwise about the shaft 111 and connected to the output link 101, a closing latch (not shown) that is operated by a closing coil 113, and a driving body 107 are integrated. A closing latch roller (not shown) that rotates in conjunction with the driving body 107 and engages with a latch engaging portion (not shown) of a closing latch (not shown), and one side is driven. The other side is connected to the closing spring 116, the closing spring 116 that stores and releases the closing spring 116 by the rotation of the driving body 107, and the output lever 112 by the rotation of the output lever 112. The load reduction lever body 119 with which the pin 118 and the load receiving portion 119a are engaged, and the engagement state between the pin 118 of the output lever 112 and the load receiving portion 119a of the load reduction lever body 119 by sucking the load reduction lever body 119. And a holding coil device 120 for holding the motor. The holding coil device 120 is always energized and excited when the vacuum valve 26 is turned on.

  The upper end 101 a of the output link 101 is connected to the output lever 112 by a connecting shaft 121. Further, the load reducing lever body 119 rotates about the pivot 119b.

  Next, the operation will be described with reference to FIGS. As shown in FIG. 3, in the vacuum valve 26, the fixed side electrode 29 and the movable side electrode 31 are closed, and the vacuum valve 26 is turned on. Accordingly, it is necessary to maintain the charged state of the vacuum valve 26.

  Although it is necessary to maintain the state in which the vacuum valve 26 is turned on, a large upward load P acts on the output link 101, and the drive lever 40 is rotated clockwise around the axis of the main shaft 39. The operation rod 38 connected to the other side 40b of 40 acts to push downward. That is, a large upward load P of the output link 101 causes the movable side electrode 31 of the movable energizing shaft 32 to move away from the fixed side electrode 29 of the fixed energizing shaft 30 to release the contact state and release the vacuum valve 26 from being turned on. Act to be.

  In order to prevent this, in the first embodiment, as shown in FIG. 4, the output lever 112 is rotated counterclockwise, and the pin 118 of the output lever 112 and the load receiving portion 119a of the load reducing lever body 119 Are engaged. As a result, the vacuum valve 26 is turned on.

  In order to maintain the engagement state between the pin 118 of the output lever 112 and the load receiving portion 119a of the load reducing lever body 119, the holding coil device 120 is always energized and excited when the vacuum valve 26 is in the on state. The plunger 120a is attracted and moved in the left direction in FIG. 4 by the attraction operation by excitation of the coil device 120, and is linked to the leftward movement of the plunger 120a by a pressing piece 120b provided at the tip of the plunger 120a. The load reducing lever body 119 is attracted to the holding coil device 120 side.

Since the load reducing lever body 119 is attracted to the holding coil apparatus 120 by constant excitation by the holding coil device 120, the engagement state between the pin 118 of the output lever 112 and the load receiving portion 119a of the load reducing lever body 119 is maintained. Therefore, the charged state of the vacuum valve 26 can be maintained.

By the way, the large upward load P acting on the output link 101 is dispersed into the component force P1 acting on the output shaft 111 and the component force P2 acting on the pin 118. The size of these component force P1 and the component force P2, the distance S1 of the vertical way direction of the axis of the connecting shaft 121 and the vertical way direction of the axis of the output shaft 111, a vertical way direction of the axis of the connecting shaft 121 to be determined by the distance S2 between the vertical way direction of the axis of the pin 118. In this case, the component force P1> component force P2, and the component force P2 is considerably smaller than the component force P1.

  The component force P2 acting on the pin 118 causes the load P3 to act on the load reducing lever body 119 in a direction perpendicular to the inclined surface of the contact portion between the load reducing lever body 119 and the pin 118. This load P3 can be divided into a horizontal component force P4 and a vertical component force P5. The magnitudes of these component forces P4 and P5 are component force P4 <component force P5, and component force P4 has a smaller component force than component force P5.

  Accordingly, the holding coil device 120 only needs an attractive force that only attracts the extremely small component force P4.

  Thus, according to the first embodiment, the large upward load P acting on the output link 101 is distributed to the component force P1 acting on the output shaft 111 and the component force P2 acting on the pin 118. Furthermore, as shown in FIG. 4, the component force P2 acting on the pin 118 is distributed into the component force P3 and the component force P4, so that the component force P2 has a suction force sufficient to suck the extremely small component force P4. The holding coil device 120 can be obtained. For example, when the large upward load P acting on the output link 101 is 500 kg, the component force P4 is about 1/10, so that the energization current to the holding coil device 120 can be reduced and the device can be downsized. Thus, it is possible to obtain a vacuum switchgear having excellent economic efficiency.

The position of engagement is the axis that is shifted in the vertical way right side of the axis of the direction of the pin 118 of the output lever 112 and the load receiving portion 119a of the pin 118 and the load reducing the lever 119 of the output lever 112 in so engaged, a direction in which disengagement of the load direction load reducing lever member 119 receives always a force receiving portion 119a of the load reducing the lever 119 and the pin 118 of the output lever 112, retention when tripped When the power to the coil device 120 is cut off, the plunger 120a moves to the right, so that the pressing force of the pressing piece 120b is cut off and the load reducing lever body 119 rotates counterclockwise.

  When the load reduction lever body 119 rotates counterclockwise, the engagement state between the pin 118 of the output lever 112 and the load receiving portion 119a of the load reduction lever body 119 is released, and the output lever 112 rotates clockwise. Move.

When the output lever 112 is rotated clockwise, the output link 101 is moved upward, the drive lever 40 is rotated clockwise around the axis of the main shaft 39 , and the other side 40 b of the drive lever 40 is rotated. The operating rod 38 connected to is pushed down, the movable side electrode 31 of the movable energizing shaft 32 is separated from the fixed side electrode 29 of the fixed energizing shaft 30 , the contact state is released, and the vacuum valve 26 is opened.

  Even when the power supply is lost, the energization to the holding coil device 120 is cut off, so that the plunger 120a moves to the right, the pressing force of the pressing piece 120b is cut off, and the load reducing lever body 119 is turned counterclockwise. Rotate.

  When the load reduction lever body 119 rotates counterclockwise, the engagement state between the pin 118 of the output lever 112 and the load receiving portion 119a of the load reduction lever body 119 is released, and the output lever 112 rotates clockwise. Move.

When the output lever 112 is rotated clockwise, the output link 101 is moved upward, the drive lever 40 is rotated clockwise around the axis of the main shaft 39 , and the other side 40 b of the drive lever 40 is rotated. The operating rod 38 connected to is pushed down, the movable side electrode 31 of the movable energizing shaft 32 is separated from the fixed side electrode 29 of the fixed energizing shaft 30 , the contact state is released, and the vacuum valve 26 is opened.

  As described above, since the vacuum valve 26 can be promptly shifted from the closed state to the open state upon a trip or loss of power, a highly reliable vacuum switching device can be obtained.

  By the way, as for the position where the plunger 120a and the pressing piece 120b of the holding coil device 120 in the first embodiment described above are disposed, the closer to the load receiving portion 119a of the load reducing lever body 119, the smaller the attractive force can be made. Therefore, further miniaturization can be achieved.

  Moreover, in Embodiment 1 mentioned above, although the case where the two operation mechanism parts 100 were provided was described, it is not limited to this, Even if the operation mechanism part 100 is 1 unit | set or 3 units | sets or more, The same effects as those of the first embodiment are obtained.

  The present invention relates to a vacuum switchgear that is used in, for example, a power transmission / distribution facility or a power receiving facility, and includes an operation rod connected to a movable energization unit and an operation mechanism unit that drives the operation rod. It is suitable for realizing a vacuum switchgear that can be downsized.

26 Vacuum valve 29 Fixed side electrode 31 Movable side electrode 32 Movable energizing shaft 38 Operation rod 39 Main shaft 40 Drive lever 100 Operation mechanism 101 Output link 103 Motor 106 Energy storage shaft 107 Drive body 109 Input cam 112 Output lever 118 Pin 119 Load reduction Lever body 119a Load receiving portion 120 Holding coil device

Claims (2)

  A vacuum valve, a main shaft whose axis is disposed perpendicular to the opening / closing direction of the electrodes of the vacuum valve, a drive lever secured to the main shaft so as to be orthogonal to the main shaft, and one side of the drive lever An operating link that rotates the main shaft via the drive lever, one side is connected to the movable energizing shaft of the vacuum valve, and the other side is connected to the other side of the drive lever. And an operation rod that moves in an opening and closing direction between the electrodes of the vacuum valve in conjunction with the rotation of the main shaft and opens and closes between the electrodes of the vacuum valve. An accumulator shaft driven by the accumulator shaft, a drive body driven by the accumulator shaft, a closing cam that is integrated with the drive body and rotates in conjunction with the drive body, and is rotated by the closing cam. With being moved An output lever connected to the output link, a load reduction lever body engaged with a pin of the output lever by rotation of the output lever, a pin of the output lever and the load reduction by sucking the load reduction lever body A vacuum switchgear characterized by comprising a holding coil device that holds an engagement state with a load receiving portion of a lever body. Wherein the engagement between the load receiving portion of the load reducing lever body and pin of the output lever is engaged at the position of axis-shifted Ri by the position of the vertical way direction of the axis of the pin of the output lever The vacuum switchgear according to claim 1.

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